Space Weather Message Code: ALTEF3 Serial Number: 3578 Issue Time: 2025 Dec 19 0756 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3577 Begin Time: 2025 Dec 17 1405 UTC Yesterday Maximum 2MeV Flux: 2694 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

This week there are no additions or deletions to the AMSAT TLE distribution. Keps mailing list -- keps@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/keps@amsat.org To unsubscribe send an email to keps-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org ...Continue Reading

SB KEPS @ AMSAT $ORB25353.1 2Line Orbital Elements 25353.AMSAT QST de W1STR AMSAT Orbital Elements for Amateur Satellites in TLE Format From Orbital Analysis Office New England Sci-Tech STEM Education Center Natick MA December 19, 2025 To all radio amateurs These element sets describe the orbits of various satellites in use by the amateur radio community. For details see: www.amsat.org/keplerian-elements-formats/ A daily update of element sets is available at: www.amsat.org/tle/daily-bulletin.txt or wit ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3577 Issue Time: 2025 Dec 18 1106 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3576 Begin Time: 2025 Dec 17 1405 UTC Yesterday Maximum 2MeV Flux: 1632 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3576 Issue Time: 2025 Dec 17 1506 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2025 Dec 17 1405 UTC Station: GOES19 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product ...Continue Reading

AMSAT News ServiceANS-348 December 14, 2025 In this edition: * Soyuz Crew Lands Ending Eight-Month Space Research Journey * Satellites Experience “Orbital Summer” And “Orbital Winter” * CCSDS Development Competition Open to European Hams * VUCC Satellite Standing December 2025 * DXCC Satellite Standing for December 2025 * A Dying Satellite May Photograph Asteroid Apophis in 2029 * Changes to AMSAT-NA TLE Distribution * Boeingâ& ...Continue Reading

The following satellite has been removed from this week's AMSAT TLE Distribution: Duchifat 3 NORAD Cat ID 44854 Decayed from orbit on or about 08 Dec 2025 The following satellites have been added to this week's AMSAT TLE Distribution: SilverSat NORAD Cat ID 66909 Downlink frequency: 437.175 MHz BEE-1000 NORAD Cat ID 66650 Downlink frequency: 436.5 MHz SNUGLITE_III DURI NORAD Cat ID 66661 Downlink frequency 436.789 MHz Joe Fitzgerald KM1P AMSAT Orbital Elements Manager Keps mailing list -- keps@amsat.org View ar ...Continue Reading

SB KEPS @ AMSAT $ORB25346.1 2Line Orbital Elements 25346.AMSAT QST de W1STR AMSAT Orbital Elements for Amateur Satellites in TLE Format From Orbital Analysis Office New England Sci-Tech STEM Education Center Natick MA December 12, 2025 To all radio amateurs These element sets describe the orbits of various satellites in use by the amateur radio community. For details see: www.amsat.org/keplerian-elements-formats/ A daily update of element sets is available at: www.amsat.org/tle/daily-bulletin.txt or wit ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3575 Issue Time: 2025 Dec 09 1210 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3574 Begin Time: 2025 Dec 05 1530 UTC Yesterday Maximum 2MeV Flux: 1040 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3574 Issue Time: 2025 Dec 08 1237 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3573 Begin Time: 2025 Dec 05 1530 UTC Yesterday Maximum 2MeV Flux: 1453 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading